That’s an interesting perspective, but I noticed you focused your attack on establishment style Republican measures and completely avoided discussion of Trump-style populism.
Trump’s big issue is immigration. Your list of polling items does not ask how many support illegal immigration, sanctuary cities, abolishing ICE, or allowing non-citizens to vote.
You should also examine the impact of identity politics. How does the electorate feel about racial reparations, political correctness, quotas, campaigns against “privilege”, race-baiting, and ubiquituos charges of racism? Where do people stand on #metoo, transgender issues, the endless charges and countercharges of sexual assault or impropriety or Biden type contact, lack of due process, and blatant hypocrisy and double-standards?
What about homelessness? Does the public think it’s ok to allow the homeless to sleep in any public square? I know some once very Progressive people who are thinking of moving because they get harassed every day walking to work and who can’t take their daughter to the nearby park and playground. They now see the Left as the movement that doesn’t care about making cities safe and clean.
As for climate change, there is nebulous support to do something that doesn’t restrict anyone and doesn’t cost a thing. Once it comes to meatless Monday and $5.00 a gallon gas and banning planes in a decade, well your support drops to single digits among young and old.
By focusing on the classic Left-Right splits of the 1990s, i believe you are missing some of the real fracture points of today’s politics. I suspect Biden represents a nostalgia for when the Democrats had good politicians at the helm who could triangulate to a point where most of the country was with them and who could reach across the aisle and get things done. They really did accomplish much and they were very popular. Whether this approach can work in today’s divisive climate is an open question, but I’m very skeptical.